For something we use every day, energy is a pretty mysterious concept. This lab from NOVA investigates what energy is, how it can be converted into useful forms, and why some sources are running low. In our Research Challenge, you'll use scientific data to design renewable energy systems for cities across the U.S.—and compete with others to see whose designs can produce the most power. This project is part of the larger NOVA Labs platform: www.pbs.org/nova/labs